Nadolig Llawen Jeff,
Apart from approaching the records office, and/or archives for the area
(basicaly, I believe, covered by the rgistration district of Lampeter) then
your next best option available online is Freebmd. Not yet complete, but
with many millions of records. Will eventually be a complete record of
British births, deaths, and marriages from 1837 to 1900.
http://freebmd.rootsweb.com/cgi/search.pl
you will know better when they were married (from the age of the children),
but a quick search shows up several Enoch Davies's marrying Mary in
Cardiganshire eg.
Regards
Phil Evans
Isle of Anglesey
North Wales